比較while, when, as 1）as, when 引導短暫性動作的動詞。 Just as / Just when / When I stopped my car, a man came up to me. 2）當從句的動作發生于主句動作之前，只能用when 引導這個從句，不可用as 或 while
讓步狀語從句 1）though, although 注意：當有though, although時，后面的從句不能有but，但是 though 和yet可連用 Although it s raining, they are still working in the field. 雖然在下雨，但他們仍在地里干活
目的狀語從句 表示目的狀語的從句可以由that, so that, in order that, lest, for fear that, in case等詞引導，例如： You must speak louder so that /in order that you can be heard by all. He wrote the name
與后接名詞或代詞保持一致 1） 用half of, part of, most of, a portion of 等詞引起主語時，動詞通常與of后面的名詞，代詞保持一致。 Most of his money is spent on books. Most of the students are taking an a
謂語需用單數 1） 代詞each和由every, some, no, any等構成的復合代詞作主語，或主語中含有each, every, 謂語需用單數。 Each of us has a tape-recorder. There is something wrong with my watch. 2） 當主語是一
謂語動詞與前面的主語一致 當主語后面跟有with, together with, like, except, but, no less than, as well as 等詞引起的短語時，謂語動詞與前面的主語一致。 The teacher together with some students is visitin
主謂一致中的靠近原則 1）當there be 句型的主語是一系列事物時，謂語應與最鄰近的主語保持一致。 There is a pen, a knife and several books on the desk.. There are twenty boy-students and twenty-three girl
時態一致 1) 如果從句所敘述的為真理或不變的事實，則永遠用現在時。 At that time, people did not know that the earth moves. He told me last week that he is eighteen. 2) 賓語從句中的助動詞ought, need, mu
一般現在時代替將來時 （1）時間狀語從句，條件句中，從句用一般現在時代替將來時 When, while, before, after, till, once, as soon as, so long as, by the time, if, in case (that), unless, even if, whether,
不用進行時的動詞 1) 事實狀態的動詞 have, belong, possess, cost, owe, exist, include, contain, matter, weigh, measure, continue I have two brothers. This house belongs to my sister. 2) 心理狀態的動詞
比較since和for Since 用來說明動作起始時間，for用來說明動作延續時間長度。 I have lived here for more than twenty years. I have lived here since I was born.. My aunt has worked in a clinic since 1949.
用于現在完成時的句型 1）It is the first / second time . that 結構中的從句部分，用現在完成時。 It is the first time that I have visited the city. 這是我第一次訪問這座城市。 It was the third time that
一般現在時表將來 1）下列動詞：come, go, arrive, leave, start, begin, return的一般現在時表將來。這主要用來表示在時間上已確定或安排好的事情。 The train leaves at six tomorrow morning. When does the bus
be going to / will 用于條件句時， be going to 表將來 will 表意愿 If you are going to make a journey, you d better get ready for it as soon as possible. Now if you will take off your clothes, we will
一般將來時 1) shall用于第一人稱，常被will 所代替。 will 在陳述句中用于各人稱，在爭求意見時常用于第二人稱。 Which paragraph shall I read first. Will you be at home at seven this evening? 2) be going
used to / be used to used to + do： 過去常常 表示過去習慣性的動作或狀態，但如今已不存在。 Mother used not to be so forgetful. Scarf used to take a walk.(過去常常散步) be used to + doing：對 已感到習
反意疑問句 1)陳述部分的主語是I，疑問部分要用 aren t I. I m as tall as your sister，aren t I? 2)陳述部分的謂語是wish，疑問部分要用may +主語。 I wish to have a word with you, may I? 3)陳述部分用 no, no
